解读中国暴雨红色预警：最高级别警报如何运作
On May 29, China's meteorological authority issued its first red alert for heavy rain this year, as torrents swept across southern regions. The highest of a four-tier warning system, a red alert means extreme danger. But what does such a warning actually tell us, and how does the system work?
5 月 29 日，中国气象部门发布了今年首个暴雨红色预警，强降雨席卷南方多地。红色预警是四级预警体系中的最高级别，意味着极端危险。但此类预警究竟向我们传达了什么信息？其运作机制又是怎样的？
China's weather warnings are color-coded: blue means general risk, yellow is moderate, orange is severe, and red signals exceptionally hazardous conditions. For heavy rain, red is declared when rainfall exceeds 100 millimeters in six hours, or above 250 millimeters in a day, and is forecast to continue. This often leads to flash floods, landslides, and urban waterlogging, threatening lives and property.
中国的天气预警采用颜色编码：蓝色代表一般风险，黄色代表中等风险，橙色代表严重风险，红色则表示极度危险。对于暴雨而言，当未来六小时降雨量超过 100 毫米或单日降雨量超过 250 毫米且预计持续时，将发布红色预警。这往往引发山洪、滑坡和城市内涝，威胁生命财产安全。
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